From Melvor Idle

A generic version of the template used in things like Template:ItemIcon or Template:UpgradeIcon.

You probably want to use one of the following instead for most things:

Format is like so: {{Icon|type=combatArea|Castle of Kings|Knight Time}} becomes Castle of Kings (combatArea).svg Knight Time.

You can also just do {{Icon|Combat}} Combat.svg Combat if you need an icon for an image that doesn't belong to a given category.

Some special overrides exist:

Input Output
{{Icon|Melee}} Combat.svg Melee
{{Icon|Item Alchemy}} Item Alchemy III (spell).svg Item Alchemy
{{Icon|Superheat}} Superheat IV (spell).svg Superheat
{{Icon|Basic Resupply}} Lobster (item).svg Basic Resupply
{{Icon|Standard Resupply}} Crab (item).svg Standard Resupply
{{Icon|Generous Resupply}} Shark (item).svg Generous Resupply
{{Icon|type=monster|Golbin}} Golbin (monster).svg Golbin
{{Icon|type=monster|Spider (lv. 51)}} Spider (monster).svg Spider (lv. 51)
{{Icon|type=monster|Spider2}} Spider2 (monster).svg Spider (lv. 52)
{{Icon|type=skill|Alt. Magic}} Magic (skill).svg Alt. Magic

Other options:

The 'notext' option sends only the image (with link), so {{Icon|Mastery|notext=true}} becomes Mastery.svg

The 'menu' option formats the icon in a handy table (useful for menuboxes) so {{Icon|Combat|menu=true}} becomes

Combat.svg Combat

The 'qty' option allows you to specify a number of items to go between the icon and the text, so {{Icon|type=item|Elder Dragonhide|qty=5000}} becomes 5,000 Elder Dragonhide (item).svg Elder Dragonhide

The 'size' option allows you to specify larger icons, so {{Icon|Combat|notext=true|size=50}} becomes Combat.svg